天然降水条件下核素在非饱和黄土中迁移快成分的特征  

CHARACTERISTICS FASTER COMPONENT OF RADIONUCLIDE MIGRATION IN UNSATURATED LOESS UNDER NATURAL RAINFALL CONDITION

作　　者：王志明[1] 杨月娥[1] 李书绅[1] 

机构地区：[1]中国辐射防护研究院,太原030006

出　　处：《辐射防护》2001年第2期73-76,共4页Radiation Protection

摘　　要：本文通过对 3H和 85Sr在黄土包气带现场示踪试验结果的分析 ,给出了快成分迁移倍速 Uq 与快成分份额 f 之间的函数关系 ,并按快成分计算出下游计算点的最大浓度与常规计算的最大浓度值的比值。结果发现 ,以质心运动速度计算下游关心地点的最大浓度在某些情况下是不保守的 ,核素迁移快成份在安全评价中的作用也是不可忽视的。The relationship between the relative velocity,U q,and faster component fraction,f,is obtained through analyses of the field tracer migration test results of 3H and 85 Sr conducted in unsaturated loess. Maximum concentration ratio calculated according to faster component and conventional method at the point concerned is given in this paper. It is found from the ratio that the results conventionally calculated by using the velocity of center of mass as a representative are not conservative under some conditions.

关 键 词：非饱和黄土 现场示踪试验 快成分 地质介质 安全评价 核素迁移 放射性废物 地表处置 

分 类 号：X591[环境科学与工程—环境工程]